Uh...suddenly my driver's side rear view mirror has about 45 degrees of play. When I drive, it (mirror and plastic housing) oscillates between normal and a close-up reflection or the door! Does anyone have any thoughts on how to fix this problem, and why it happened in the first place? Keep in mind I'm not normally a do-it-yourselfer. It's still under warranty, but it's Sunday and I hope to fix the problem today.

There's no apparent external damage, and the mirror housing retracts and opens normally with a press of the button. Thanks for your help!

2004 x5 4.4i
Sport and Comfort Packages
19" rims
Grey/Black